Improvement in harrow-couplings



UNITED STATES PATENT OFFICE.

ALEXANDER B. CAMPBELL, OF ALBION, WISCONSIN.

IMPROVEMENT IN HARROW-COUPLINGS.

Specification forming part of Letters Patent No. 222,864, dated December 23, 1879 application filed October 9, 1879. e

To all whom it may concern:

Be it known that I, ALEXANDER BURDICK CAMPBELL, of Albion, in the county of Dane and State of Wisconsin, have invented a new and Improved Harrow-Coupling, of which the following is a specification.

The objectof my invention is to provide a new and improved barrow-coupling, which shall form a flexible connection between the several barrow-bars, and which shall be simple in construction and convenient and effective in use The invention consists in a harrow-coup1ing formed of a clevis attached to a barrow-bar, the upper shank of which clevis is lengthened and terminates in an eye, into which a barhook attached to the forward part of the clevis of the following barrow-bar passes.

two jaws H and H of the hook F and through one of the apertures J J. A spring-pin, K, keeps the pin G in place, and prevents it from falling out.

The barrow-bar is placed into the recess formed by the two shanks and the front part of the clevis, and is secured by a screw-bolt, L, which passes through both shanks of the elevis and through the barrow-bar, as shown, or, if the latter is narrow, passes along the rear side of the same.

One of the improved couplings is attached to each end of each barrow-bar in the manner described above.

A certain number of barrow-bars, according to the condition of the land or the size of the barrow required, are united in the following manner: The bar-hook F is separated from the clevis, is held at an angle of ninety degrees (in the horizontal plane) to the upper shank, B, the narrow part of the eye 0 at D is passed through the opening E into the loop of the hook F, which is brought into a position parallel to B, and is then pivoted to the clevis on the following barrow-bar. In this way any number of bars can be conveniently and rapidly connected, and any defective bar can be easily removed.

If a tooth of one bar has been caught by some obstruction, the rear bars are rolled up, the obstruction easily removed, and the trouble and danger of raising a heavy harrow are avoided. Two barrows formed of these couplings and a number of barrow-bars can be attached to one draft-bar.

The harrow can be conveniently rolled up with all the teeth projecting toward the inside for storage. The barrow can be drawn from either side. The hooks cannot pass out of the eye 0, for they can only be. inserted or removed when in the position described, and they cannot assume this position as long as several harrow-bars are connected.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- As an improved article of manufacture, a barrow-coupling made as herein shown and described, consisting of a clevis, A, adapted to receive the barrow-beam, and having its shank B provided with an eye, G, to which a bar-hook, F, may be pivoted, all as set forth.

ALEXANDER BURDIOK CAMPBELL.

Witnesses R. T. BURnIcK, T. B. COLLINS. 

